writes/reads int32 when should be float32 about wav.jl HOT 5 CLOSED

i should add that were this a write problem, then it might be related to issue #7. also, here's my version info:

julia> versioninfo()
Julia Version 0.3.0-prerelease+1578
Commit 052869f* (2014-02-14 13:00 UTC)
Platform Info:
System: Linux (x86_64-redhat-linux)
CPU: Intel(R) Xeon(R) CPU E5645 @ 2.40GHz
WORD_SIZE: 64
BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY)
LAPACK: libopenblas
LIBM: libopenlibm

julia> Pkg.status()
6 required packages:

• ClusterManagers 0.0.1
• Debug 0.0.0
• Devectorize 0.2.1
• Distributions 0.3.4
• MAT 0.2.2
• WAV 0.2.2

7 additional packages:

• ArrayViews 0.4.0
• BinDeps 0.2.12
• HDF5 0.2.17
• NumericExtensions 0.4.3
• StatsBase 0.3.6
• URIParser 0.0.1
• Zlib 0.1.3

from wav.jl.

The wavwrite function uses the PCM format by default. You need to specify IEEE float (compression=WAVE_FORMAT_IEEE_FLOAT) when you write the file:

wavwrite(tmp,"foo.wav"; nbits=32, compression=WAVE_FORMAT_IEEE_FLOAT)

from wav.jl.

ahah, that works. the documentation though says that if the data are floats and nbits is 32 then the output format is single, and makes no mention of the compression format there. perhaps the table needs to be updated?

also, i've uncovered another related error:

julia> tmp=rand(Float32,(10,2))
10x2 Array{Float32,2}:
0.402853 0.359412
0.839331 0.918946
0.37568 0.355417
0.631095 0.914516
0.529367 0.796124
0.771321 0.21159
0.464903 0.874699
0.396011 0.121397
0.149417 0.0536192
0.470153 0.17993

julia> wavwrite(tmp,"foo.wav"; compression=WAVE_FORMAT_IEEE_FLOAT)
ERROR: 16 bits is not supported for WAVE_FORMAT_IEEE_FLOAT.
in error at error.jl:21
in ieee_float_container_type at /Users/arthurb/.julia/WAV/src/WAV.jl:201
in write_ieee_float_samples at /Users/arthurb/.julia/WAV/src/WAV.jl:322
in write_data at /Users/arthurb/.julia/WAV/src/WAV.jl:348
in wavwrite at /Users/arthurb/.julia/WAV/src/WAV.jl:436
in wavwrite at /Users/arthurb/.julia/WAV/src/WAV.jl:442

from wav.jl.

I will look into changing the default nbits value when the compression is set to WAVE_FORMAT_IEEE_FLOAT.

I will also push a change into the documentation, unless you submit a pull request first. You can edit README.md through the github web interface and create a pull request.

from wav.jl.

I finally got around to working on this. Let me know if I missed anything.

from wav.jl.